[Eeglablist] Analysis of TMS-induced harmonics in the EEG

Johanna Wagner joa.wagn at gmail.com
Fri Jan 8 14:41:33 PST 2021


Hi Juliana,

if you want to estimate relationships between oscillations at different
frequencies there is a very nice toolbox in eeglab that has been recently
released *PACtools* available here.
https://urldefense.com/v3/__https://github.com/sccn/PACTools__;!!Mih3wA!WT4TdNQOY6YacExyX_LVmfL-3Wk26idB4TO5auiDATCnkc6zOX6Kyo3-Nrpm5rZT5zlJxg$ 

The toolbox allows estimating all sorts of relationships such as phase to
amplitude coupling (PAC), amplitude to amplitude coupling, phase to phase,
and so on using the most common methods for PAC used in the literature. It
also has a new method implemented that estimates instantaneous and
Event-Related PAC using Mutual Information (see Martinez-Cancino et al
2019).

If you want to use the *IMAT* toolbox let me know, it will be released
soon. The IMAT toolbox can separate independent spectral modulators in EEG
brain source activity and thus should be able to identify independent
spectral peaks and related harmonic activity.

Best wishes, Johanna


Am Fr., 8. Jan. 2021 um 20:35 Uhr schrieb Dr. Michael Villanueva <
mvillanueva at alphathetacenter.com>:

> And I add PowPowCAT has offers grounded scientific unprecedented clinical
> insight into the brain for neurofeedback providers.  We have used PPC in
> our lab since its inception in 2017.
>
> Michael
>
> -----Original Message-----
> From: eeglablist <eeglablist-bounces at sccn.ucsd.edu> On Behalf Of Makoto
> Miyakoshi
> Sent: Thursday, January 7, 2021 6:43 PM
> To: EEGLAB List <eeglablist at sccn.ucsd.edu>
> Subject: Re: [Eeglablist] Analysis of TMS-induced harmonics in the EEG
>
> Dear Juliana,
>
> I have been waiting for a person like you. Thank you for such a nice
> question.
> I am glad because the best way to study harmonics is to use my power-power
> coupling analysis toolbox (PowPowCAT) which was just published last
> December. Comodulogram/comodugram is the straightforward metric of
> cross-frequency power coupling.
>
>
> https://urldefense.com/v3/__https://www.mdpi.com/1424-8220/20/24/7040__;!!Mih3wA!UoxPibkD5yV6OGwVNDbdkDocyRfWscHLWk_rga1hmv9jvEnybfa7YUMXaF9oCQEvqseqNQ$
>
> https://sccn.ucsd.edu/wiki/Cross-frequency_power-power_coupling_analysis_tool_(PowPowCAT)
>
> PowPowCAT is readily available as an EEGLAB plugin (it's been there since
> 2017). Please try it out and let me know if it works for your purpose.
> Looking forward to hearing back from you.
>
> Makoto
>
> On Thu, Jan 7, 2021 at 12:20 PM JULIANA CORLIER <corlier at g.ucla.edu>
> wrote:
>
> > Dear list,
> >
> > I would like to get some expert advice on how to assess/quantify the
> > presence of harmonics in the EEG.
> > Notably, our lab is using EEG recordings during repetitive
> > transcranial magnetic stimulation (TMS) and we would like to assess
> > whether the stimulation at a certain frequency elicits an entrainment
> > at the stimulation frequency but also at other frequencies.
> >
> > My first approach was to check for ‘ratios of frequencies’ that show
> > activation in the time-frequecy domain post stimulation, but that
> > turned out to be a more tricky than I have aniticipated.
> > I was wondering if there is a proper approach to harmonics analysis?
> > One would think that engineers and signal processing experts outside
> > of neurosciences deal all the time with that.
> >
> > Any advice is much appreciated!
> >
> > Thank you!
> >
> > Juliana Corlier
> >
> >
> >
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-- 

-- 
Johanna Wagner, PhD
Postdoctoral Researcher
Swartz Center for Computational Neuroscience
Institute for Neural Computation
University of California San Diego

https://sccn.ucsd.edu/people/#Postdoctoral-Fellows
https://urldefense.com/v3/__http://scholar.google.at/citations?user=vSJYGtcAAAAJ&hl=en__;!!Mih3wA!WT4TdNQOY6YacExyX_LVmfL-3Wk26idB4TO5auiDATCnkc6zOX6Kyo3-Nrpm5rY7SkWBuA$ 




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